The document: "MSP430x2xx Family User's Guide (Rev. F)" , slau144f.pdf,
on page 5-5 "LFXT1 Oscillator", it says
"Software can disable LFXT1 by setting OSCOFF, if LFXT1CLK does not source SMCLK or MCLK"
but on page 5-3 "Basic Clock Module+ Block Diagram",
this diagram shows LFXT1 can disable by clearing OSCOFF
is it a mistake?
eric chungs it a mistake?
The OSCOFF register marker in the diagram does not contain any polarity info. it 'influences' the input driver and the oscillator, but this does not necessarily mean that a '1' value in the register means 'enable'.
One cold draw an inverting circle on the driver, but for the oscillator blackbox, the signal polarity has no meaning in this drawing, so I guess that for the driver, it was left to the register description too.
In any case, setting OSCOFF bit will disable the (LF)XT1. That's why the register bit is named OSCOFF. it's what it does when set.
Same applies to XT2OFF
I'm currently (June 30th) lagging about 600 threads behind in the forum. I try to catch up, but don't expect an answer in less than about 4 weeks.Before posting bug reports or ask for help, do at least quick scan over this article. It applies to any kind of problem reporting. On any forum. And/or look here.If you cannot discuss your problem in the public, feel free to start a private conversation: click on my name and then 'start conversation'. But please do so only if you really cannot do it in a public thread, as I usually read all threads. And I prefer to answer where others can profit from it (or contribute to it) too.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.